PChemLabTXT_page_405

PChemLabTXT | page 405 | https://thedailydialectics.com/pdfs/education/chemistry/p-chem/PChemLabTXT/PChemLabTXT.pdf

Rev. Confirming Pages ic 394 Chapter XIV Spectroscopy gar28420_ch14_393-499 394 THEORY The visible bands for polymethine dyes arise from electronic transitions involving the a electrons along the polymethine chain. The wavelength of these bands depends on the spacing of the electronic energy…